plastic bags的含义是______。
A. 包装袋
B. 书包
C. 塑料制品
D. 塑料袋
Did you ______ the lecture in the library yesterday afternoon?
A. go
B. have
C. attend
D. buy
But I am still a little bit puzzled.的含义是______。
A. 但我还是有很多困惑。
B. 但我还是有点困惑。
C. 但我还是有点害怕。
D. 但我还是有点难过。
What do you mean ____ living a low-carbon life?
A. at
B. by
C. to
D. for
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